Zircon StudSensor i65 OneStep Center Finding Stud Finder with DVD How-To Guide: * Stud Scan mode locates the edges and center of wood or metal studs up to 3/4"D * DeepScan mode doubles the scanning depth to 1-1/2" * LCD display indicates direction, edges and center of studs * Patented SpotLite pointing system and audio tone signals when the stud center is reached * WireWarning detection indicates the presence of live, unshielded electrical wiring up to 2"D * ACT (Auto Correcting Technology) automatically corrects common user errors, such as when scanning begins over a stud